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Eryngium variifolium

Eryngium variifolium
Sea Holly

5,0/5
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Plant received in good condition. Can't wait to see the shoots grow.

Annie, 15/04/2023

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This plant carries a 12 months recovery warranty

More information

Value-for-money
A perennial plant with dark green evergreen leaves and prominent white veins. Blue-purple flowers highlighted by large silver bracts. Flowers in the middle of summer.
Flower size
3 cm
Height at maturity
40 cm
Spread at maturity
30 cm
Exposure
Sun
Hardiness
Hardy down to -15°C
Soil moisture
Dry soil
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Best planting time February to March, September to October
Recommended planting time February to April, September to November
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Flowering time June to August
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Description

Eryngium variifolium is a perennial characterised by its evergreen dark green foliage with prominent white veins. Its spiny, mauve-blue inflorescences are carried by erect, stiff and ramified silver-blue stems during the summer months. This variegated sea holly, which will not exceed 40 cm (16in) in height, has flowers grouped in heads with a diameter of 2.5 cm (1in), surrounded by silver-blue bracts forming large stars between June and August.  The spiny margins of the coloured bracts, surrounding the central flower, resemble thistles and are the origin of its other common name, ornamental thistle.

From picturesque to contemporary scenes, its colours range from green to silver mixed with the blue of the flowers, and its graphic design allow it to blend into many situations. Ideally planted in full sun, the variegated sea holly loves heat and drought, and adapts to all sunny, well-drained and deep soils with a tendency towards limestone; it even withstands coastal areas. It dislikes wet soil, especially in winter. To prolong its decorative effect beyond the summer outdoors, you can easily make dried bouquets as it retains its beautiful colours when drying.

Eryngium variifolium works well in a rock garden, border, wild or contemporary garden alongside Gauras, Mulleins (Verbascums), Sages (Salvias or Perovskias), or some Stipas.

Eryngium variifolium in pictures

Eryngium variifolium (Flowering) Flowering
Eryngium variifolium (Foliage) Foliage

Flowering

Flower colour grey
Flowering time June to August
Inflorescence Flower head
Flower size 3 cm
Bee-friendly Attracts pollinators
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Evergreen
Foliage colour variegated

Plant habit

Height at maturity 40 cm
Spread at maturity 30 cm
Growth rate normal

Botanical data

Genus

Eryngium

Species

variifolium

Family

Apiaceae

Other common names

Sea Holly

Origin

North Africa

Planting and care

Eryngium variifolium should be planted from September to April in a well-draining, dry, poor and rocky soil in full sun. In heavy soil or in excessively humid regions, mix compost, sand and gravel with your garden soil and plant on a mound. Don't forget to place gravel at the bottom of the hole for good drainage. It is sensitive to winter moisture.

Planting period

Best planting time February to March, September to October
Recommended planting time February to April, September to November

Intended location

Suitable for Meadow, Rockery
Type of use Border, Edge of border
Hardiness Hardy down to -15°C (USDA zone 7b) Show map
Ease of cultivation Amateur
Planting density 5 per m2
Exposure Sun
Soil pH Neutral, Calcareous
Soil type Chalky (poor, alkaline and well-drained), Stony (poor and well-drained)
Soil moisture Dry soil, Draining

Care

Pruning No pruning necessary
Disease resistance Good
Overwinter Can be left in the ground
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